CBSE Class 10 Answered
i)Differentiate between homozygous and heterozygous organisms.
ii) Briefly explain the process of fossil formation.Explain its types also.
Please answer all these questions in this post....because tomorrow is my science' board paper.
Asked by vijayjethi17 | 21 Mar, 2017, 05:58: PM
Expert Answer
Hi Vijay,
(1) Differences between homozygous and heterozygous individuals:
Homozygous individual |
Heterozygous individual |
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(2) Process of fossil formation:
- Some of the invertebrates on the sea-bed died and got buried in the sand.
- More and more sand got accumulated and formed sandstone under pressure.
- After millions of years, dinosaurs living in the area died and their bodies were buried in the mud.
- The mud got compressed into the rock, just above the rock containing earlier invertebrate fossils.
- Again millions of years later, the bodies of horse-like creatures dying in the area were fossilized in the rocks above the earlier rocks.
- Much later, due to erosion and water flow some of the rocks wore out and exposed the horse-like fossils.
(3) Types of fossils:
- Trace fossils
- Casts
- Molds
- Petrified fossils
- Frozen fossils
Answered by | 21 Mar, 2017, 06:14: PM
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